Yamaha A100 is a power amplifier featuring large VU meters. Its power output is rated at 50W + 50W (stereo, into 8 Ohm) or, when used in a monaural configuration, 100W (BTL connection, into 16 Ohm). It has high quality VU level meters (with clipping indicators) and a PHONES jack that allows monitoring of output using stereo headphones. The compact, lightweight half-rack 2U size design means the A100 takes up little space and is easy to carry.